| /* ---------------------------------------------------------------------------- |
| * ATMEL Microcontroller Software Support |
| * ---------------------------------------------------------------------------- |
| * Copyright (c) 2009, Atmel Corporation |
| * |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * - Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the disclaimer below. |
| * |
| * Atmel's name may not be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE |
| * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, |
| * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
| * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * ---------------------------------------------------------------------------- |
| */ |
| |
| /** |
| * \file |
| * |
| * Interface for configuration the Two Wire Interface (TWI) peripheral. |
| * |
| */ |
| |
| #ifndef _TWI_ |
| #define _TWI_ |
| |
| /*------------------------------------------------------------------------------ |
| * Headers |
| *------------------------------------------------------------------------------*/ |
| |
| #include "chip.h" |
| |
| #include <stdint.h> |
| |
| /*---------------------------------------------------------------------------- |
| * Macros |
| *----------------------------------------------------------------------------*/ |
| /* Returns 1 if the TXRDY bit (ready to transmit data) is set in the given status register value.*/ |
| #define TWI_STATUS_TXRDY(status) ((status & TWI_SR_TXRDY) == TWI_SR_TXRDY) |
| |
| /* Returns 1 if the RXRDY bit (ready to receive data) is set in the given status register value.*/ |
| #define TWI_STATUS_RXRDY(status) ((status & TWI_SR_RXRDY) == TWI_SR_RXRDY) |
| |
| /* Returns 1 if the TXCOMP bit (transfer complete) is set in the given status register value.*/ |
| #define TWI_STATUS_TXCOMP(status) ((status & TWI_SR_TXCOMP) == TWI_SR_TXCOMP) |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /*---------------------------------------------------------------------------- |
| * External function |
| *----------------------------------------------------------------------------*/ |
| |
| extern void TWI_ConfigureMaster(Twi *pTwi, uint32_t twck, uint32_t mck); |
| |
| extern void TWI_ConfigureSlave(Twi *pTwi, uint8_t slaveAddress); |
| |
| extern void TWI_Stop(Twi *pTwi); |
| |
| extern void TWI_StartRead( |
| Twi *pTwi, |
| uint8_t address, |
| uint32_t iaddress, |
| uint8_t isize); |
| |
| extern uint8_t TWI_ReadByte(Twi *pTwi); |
| |
| extern void TWI_WriteByte(Twi *pTwi, uint8_t byte); |
| |
| extern void TWI_StartWrite( |
| Twi *pTwi, |
| uint8_t address, |
| uint32_t iaddress, |
| uint8_t isize, |
| uint8_t byte); |
| |
| extern uint8_t TWI_ByteReceived(Twi *pTwi); |
| |
| extern uint8_t TWI_ByteSent(Twi *pTwi); |
| |
| extern uint8_t TWI_TransferComplete(Twi *pTwi); |
| |
| extern void TWI_EnableIt(Twi *pTwi, uint32_t sources); |
| |
| extern void TWI_DisableIt(Twi *pTwi, uint32_t sources); |
| |
| extern uint32_t TWI_GetStatus(Twi *pTwi); |
| |
| extern uint32_t TWI_GetMaskedStatus(Twi *pTwi); |
| |
| extern void TWI_SendSTOPCondition(Twi *pTwi); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* #ifndef _TWI_ */ |